Crosbie was thirty-five and came from Liverpool Sponge.
Crosbie was a housemate with Strood and Lynda on Big Brother when the Ninth Doctor was transmattted in. She was the eighth housemate to be evicted. A great cook, she apologised for stealing Lynda Moss's soap.
Although apparently disintegrated, she was actually transmatted to the Dalek mothership, where human captives were having their cells extracted and cultivated into a Dalek army by the Emperor. (TV: Bad Wolf)